New snake!

So I was given, or rather, took, on a new corn snake. The person I received the snake from bought her as an impulse buy and decided they didn't want her and since I've been really wanting a snake for a while now. They really gave me no info on her except that she eats 2 pinkies every week. So a few questions I have about her (I'm guessing it's a she):
-Is there a way to guess her age, a rough estimate?
-Is two pinkies too much? shes kinda small and weighs 12g. But 24hr after feeding one pinkie there was no lump so she must have digested it quite fast. I've read somewhere that its a sign to feed more, is that true?
-Any tips on taming her? Shes not nippy just darty when i get her from the tank, and when i'm holding her shes very curious and moves around but isn't darty.
-Whats her morph? Not important i'm just curious, I think shes an anery motley hurricane?
- Any other tips for a new corn snake owner?
Thanks!!!!